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<WRAP tablewidth column 30% right>
{{METATOC}}
~~NOTOC~~ \\
^ Manufacturer    | Alps |
^ Model    | DFC642B |
^ Density    | <abbr>High Density (HD)</abbr>, <abbr>Double Density (DD/2D)</abbr>  |
^ Sides    | <abbr>Double Sided (DS/2S)</abbr>, <abbr>Single Sided (SS/1S)</abbr> |
^ Rotation speed | 300, 360 |
^ Maximum seekable tracks   | 84((Modification is required)) / 83 |
^ Interface | Shugart \\ (PC-AT compatible) |
^ Data connector | 34 position card edge |
^ Power connector | 4 pin Molex |
^ Head movement | Metal belt |
^ Head loading | Solenoid |
^ Disk locking | Lever |
^ Known colors |<WRAP>
| <colorswatch #ABA28B: > | Dark Beige \\ (PC-AT Gray) |
</WRAP>|
</WRAP>
====== Alps DFC642B ======
The DFC642B is a 5.25" double sided high density floppy drive made by Alps. It uses a metal belt to facilitate head movement and locks the disk with a lever. Head loading is done with a solenoid.
It uses the [[#geb-2294v-0|GEB-2294V-0 ]] control board and the Sankyo F2SPR motor board.

===== Variants =====
==== DFC642B01B  ====
=== Pictures ===
| {{:5_25_floppy_drives:alps_dfc642b:back.jpg?200 |}} | {{:5_25_floppy_drives:alps_dfc642b:top.jpg?200 |}} | {{:5_25_floppy_drives:alps_dfc642b:bottom.jpg?200 |}} |
| {{:5_25_floppy_drives:alps_dfc642b:front.jpg?200 |}} | ::: | ::: |

===== Jumper settings =====
==== GEB-2294V-0 ====
{{ :5_25_floppy_drives:alps_dfc642b:geb-2294v-0.pdf |}}
++++View PDF|
{{pdfjs 100%,800px>:5_25_floppy_drives:alps_dfc642b:geb-2294v-0.pdf?page-width}}
++++

===== Modifications =====
==== 84 track seeking ====
Unmodified drives will not be able to seek 84 tracks. A small modification is required to enable this.

{{:5_25_floppy_drives:alps_dfc642b:mod_84tracks_1.jpg?200|}}
{{:5_25_floppy_drives:alps_dfc642b:mod_84tracks_2.jpg?200|}}

The modification can be performed by following these steps:
  - Loosen the two screws holding the end stop of the stepper motor as pictured.
  - Move the end stop all the the way up, away from the axle.
  - Tighten the screws while retaining the end stop in the upper position.